def get_jiecheng(number):
    result = number
    while number > 0:
        result *= number
        number -= 1
    return result


print(f"3的阶乘 = {get_jiecheng(3)}")
print("5的阶乘 = ", get_jiecheng(5))
print(f"5的阶乘 = {get_jiecheng(5)}")
print(f"100的阶乘 = {get_jiecheng(100)}")
